1. Layout Overview

Large Object layouts support only three types of pages: Detail Page, Create/Edit Page, and List Page.

2. Creating a Layout

2.1 Detail Page

UI Events are not supported on Large Object detail pages.

The Primary Attribute component on Large Object detail pages does not support displaying labels.

Within Business Components on Large Object detail pages, Associated Object components do not support setting Roll-Up fields.

2.2 Create/Edit Page

Same behavior as standard objects. After enabling “Use custom Create/Edit Page layout,” you can configure the Create/Edit layout independently.

2.3 List Page

Large Object list pages support List View only.

Large Object list pages do not support Roll-Up field configuration.